Two trades, same profit, completely different results
You sell a put on RKLB and collect $142 in premium. The option expires worthless. You made $142.
Your friend sells a put on COST and collects $140 in premium. The option expires worthless. They made $140.
Same outcome. Roughly the same profit. But these are not remotely comparable trades.
Premium
$142
Capital at risk
$2,200
Premium
$140
Capital at risk
$56,000
Same dollars. Wildly different businesses. This is why dollar returns are a misleading way to evaluate wheel trades — and why Archer measures performance in ROM.
Return on Margin — the right unit
ROM stands for Return on Margin. It's simple: premium collected divided by capital required.
Capital at risk for a cash-secured put is the strike price times 100 (times number of contracts). It's the amount you'd need to buy the shares if assigned.
This single metric makes trades across different stocks, different price levels, and different volatility environments directly comparable. A 3% ROM on one position and a 3% ROM on another position represent equivalent use of capital — regardless of whether one generated $45 and the other generated $450 in absolute dollars.
ROM in practice — why it changes your decisions
Once you think in ROM, you start seeing the options landscape differently.
A high-priced, low-volatility stock that pays decent-sounding dollar premiums often looks mediocre in ROM terms. COST at $960 with modest implied volatility might generate a $0.80 put premium — $80 on $96,000 in capital commitment. That's 0.08% ROM. For comparison, a 30-day Treasury bill yields more with zero risk. It's not a trade worth making.
A mid-priced, moderate-volatility stock with the right setup can generate 2–4% ROM in 30 days. Annualized, that's 24–48% before accounting for compounding and redeployment. That's the zone systematic wheel traders are working in.
The metric also helps you compare the same trade across time. If AMZN consistently generates 2.1% ROM in a 30-day cycle, and NVDA generates 3.8% ROM on average, you have real information for capital allocation. Without ROM, you're just looking at dollar amounts that don't adjust for capital commitment.
ROM vs. other return metrics
Total return (dollar profit): Tells you what you made, not whether it was worth the capital. Useless for comparison across positions.
Annualized return on cost: Better, but doesn't account for the fact that your capital is reserved (not deployed) during the holding period.
Sharpe ratio: A classic portfolio performance metric, but poorly suited to systematic put selling. The Sharpe ratio penalizes negative skewness — and the wheel strategy has negative skewness by design (many small wins, occasional larger losses). Sharpe will make the wheel look worse than it is.
Sortino ratio: Better than Sharpe for this strategy, because it only penalizes downside volatility, not all volatility. If you're running systematic puts and covered calls, Sortino is a more honest characterization of your risk-adjusted performance.
ROM: The right operational metric for individual trade decisions and cycle-level performance. Not a complete portfolio metric, but the right tool for the question "was this a good use of capital?"
How to compare the wheel to VOO
The most common question from systematic wheel traders: how do I know if this is actually better than just buying the S&P 500?
It's a fair question, and the honest answer is: it depends on the market regime.
In a strong bull market, buy-and-hold typically wins. When stocks are grinding steadily higher, selling covered calls caps your upside and selling puts means you're collecting premiums on stocks that are rising away from your strikes. You're leaving appreciation on the table.
In a flat or choppy market, the wheel tends to outperform significantly. Theta decay works in your favor consistently, and the buy-and-hold investor is going nowhere while you're collecting premiums cycle after cycle.
In a down market, both strategies lose. But the wheel loses differently — your losses are partially buffered by the premium you collected, and you're generating income from covered calls while you hold assigned shares. The psychological experience is also different: you're doing something systematic rather than watching a passive portfolio decline.
The honest comparison isn't "wheel vs. VOO" in absolute terms. It's "wheel vs. VOO given your specific market regime, stock universe, and risk tolerance." Archer tracks your ROM over time specifically so you can make this comparison with real data from your own trades rather than hypothetical backtests.